Tips & News - December 2013

clever is the New Smart Hubbell Power Systems is redefining smart with products like the Trinetics ® SmartClose, the 3-phase Synchronous Close Vacuum Capacitor Switch. The following installation instructions provide a look at how clever it is.

The equipment covered by these installation instructions should be installed and serviced only by properly trained and qualified personnel. It is not the intent of these instructions to provide for every possible condition in connection with installation, operation or maintenance, nor to cover all details or variations in equipment options. Should problems arise which are not sufficiently covered herein or should further information be required, the matter should be directed to Hubbell Power Systems, Inc.

the maintenance personnel have established that the visible disconnects are open and the portion of the circuit to be worked on is grounded. Refer to local Codes & Practices for specific component requirements. A five-pin receptacle is included for switch operation, and a six-pin receptacle is included for switch status. These receptacles can mate with five-pin and six-pin molded (or metal) connectors, respectively. The 5-pin mating cable and connector includes a six-foot 14/5 SO cable, reference Trinetics part number 33124102. The metal plug is an ITT/ Cannon connector, part number CA06R18-12SF42 or equivalent, which meets the MIL-C-5015 specification. Alternate receptacle configurations are available from Trinetics. SmartClose switches may be mounted directly to a pole, structure, or cross arm. Contact Hubbell/Trinetics for more details when pole or cross arm mounting is required. 3-Phase SmartClose, 200A & 400A Models The three-phase, 200A & 400A SmartClose switches are provided with 2-hole NEMA tin plated bronze terminals on each bushing. Each pole operates independently; each vacuum switch can be opened or closed electrically or by manual lever. Separate opening and closing solenoids provide ideal vacuum interrupter contact motion through a rotating cam. The proprietary cam curve provides excellent weld break capability as well as improved vacuum bellows life. The mechanism utilizes sealed ball bearings to provide more than 50,000 open and 50,000 close operations. A spring latches the mechanism in either position, and also provides the toggle action. The mechanism is sealed in a corrosion resistant powder painted steel tank with zinc rich primer. Operation 40 to 150 VAC OR VDC close or open commands should have a minimum pulse duration of 100ms. The maximum pulse duration is unlimited; inputs are opto-isolated with 50k ohm impedance. An open command takes precedence over a close command. Open and Close signals, common, neutral, and 120V for SmartClose are supplied via a 5-pin receptacle. bank controls and systems that send a command signal when the capacitor bank should be switched. The synchronous close logic imbedded in the SmartClose mechanism tank receives

SmartClose Ratings: 3-ph, 15kV, 110kV BIL, 200A 3-ph, 15kV, 110kV BIL, 400A 3-ph, 24kV, 125kV BIL, 200A 3-ph, 24kV, 125kV BIL, 400A

Introduction SmartClose is derived from the UltraVac vacuum switch, a solid dielectric single pole device designed in conformance with ANSI Standard C37.66. Using this maintenance free technology, SmartClose is a completely integrated synchronous (or zero voltage) closing system making it compatible with nearly all existing capacitor bank control schemes. Integral to the switch are six voltage sensors and an onboard actuator to provide zero voltage closing. Each pole of the 3-phase SmartClose switch is constructed from a high performance vacuum interrupter fully encapsulated within a solid dielectric cycloaliphatic epoxy. AC power and a close signal from the capacitor bank control are the only external inputs required to provide point on wave closing in almost any capacitor switching application. The SmartClose is available in a single body, 3-pole configuration, for use in synchronous close/zero voltage close, switched capacitor bank applications. The SmartClose synchronous closing design has been tested to reliably provide accurate closes to within 800 millionths of a second ( +17 degrees). Installation Air-break isolating switches must be installed on the supply side of vacuumswitches to provide a visible disconnect. Cutouts or fused disconnects are normally used for this purpose. Maintenance work should be undertaken only after